Buick 2007 Terraza Owner's Manual page 354

When this warning light is on, the system will not
limit wheel spin. Adjust your driving accordingly.
If the SERVICE TRACTION SYSTEM message in
the DIC comes on and stays on or comes on
while you are driving, there's a problem with your
traction control system. Have the traction
control system serviced by your GM dealer as
soon as possible.
When this warning message is on, the TRACTION
CONTROL OFF message in the DIC will come
on to remind you that the system will not limit
wheel spin. Adjust your driving accordingly.
354
This warning light will
come on to let you
know if there is
a problem with your
traction control system.
The traction control system automatically comes
on whenever you start your vehicle. To limit wheel
spin, especially in slippery road conditions, you
should always leave the system on. But you
can turn the traction control system off if you ever
need to. You should turn the system off if your
vehicle ever gets stuck in sand, mud or snow and
rocking the vehicle is required. See Rocking
Your Vehicle to Get It Out on page 378 and If Your
Vehicle is Stuck in Sand, Mud, Ice, or Snow on
page 377.
To turn the system off,
press the traction
control button located
on the center of
the instrument panel.